Antenna design considerations for high specific absorption rate in local hyperthermia treatment

AbstractIn this paper, a complete wireless power transmission scenario is presented, including an external transmission antenna, an in-body embedded antenna, a rectifying circuit, and a powered sensor. This system operates at the Industrial, Scientific, and Medical bands (902.8–928 MHz). For the antenna design, important parameters including reflection coefficient, radiation pattern, and specific absorption rate are presented. As for the rectifying circuit, a precise model is created utilizing off-the-shelf components. Several circuit models and components are examined in order to obtain optimum results. Finally, this work is evaluated against various sensors' power needs found in literature.

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Specific absorption rate and tissue temperature in local hyperthermia

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/0360-3016(86)90137-9 ◽

1986 ◽

Vol 12 (11) ◽

pp. 1997-2002 ◽

Cited By ~ 6

Author(s):

H. Griffiths ◽

A. Ahmed ◽

C.W. Smith ◽

J.L. Moore ◽

I.J. Kerby ◽

...

Keyword(s):

Absorption Rate ◽

Specific Absorption Rate ◽

Tissue Temperature ◽

Specific Absorption ◽

Local Hyperthermia

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Flexible Dual-Frequency Applicator for Local Hyperthermia

International Journal of Antennas and Propagation ◽

10.1155/2012/389214 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7

Author(s):

Houda Halheit ◽

André Vander Vorst ◽

Smail Tedjini ◽

Rachida Touhami

Keyword(s):

Liquid Crystal ◽

Human Body ◽

Absorption Rate ◽

Specific Absorption Rate ◽

Cylindrical Body ◽

Liquid Crystal Polymer ◽

Dual Frequency ◽

Specific Absorption ◽

Local Hyperthermia ◽

Crystal Polymer

A flexible and dual-frequency microstrip applicator for microwave local hyperthermia is described. It is designed on conformal liquid crystal polymer (LCP) substrate and operating at ISM (Industrial, Scientific and Medical) frequencies of 915 MHz and 2.45 GHz. To conform the body’s curvature, the applicator is bent on a cylindrical body. 3D electromagnetic CST Microwave Studio was used to determine the performance of the applicator and to evaluate the specific absorption rate (SAR) distribution in cylindrical human body phantom. The results obtained show that the antenna can be used in curved situation for uniform and superficial treatment.

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Toward Online Adaptive Hyperthermia Treatment Planning: Correlation Between Measured and Simulated Specific Absorption Rate Changes Caused by Phase Steering in Patients

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/j.ijrobp.2014.05.1307 ◽

2014 ◽

Vol 90 (2) ◽

pp. 438-445 ◽

Cited By ~ 26

Author(s):

H. Petra Kok ◽

Silvia Ciampa ◽

Rianne de Kroon-Oldenhof ◽

Eva J. Steggerda-Carvalho ◽

Gerard van Stam ◽

...

Keyword(s):

Treatment Planning ◽

Absorption Rate ◽

Specific Absorption Rate ◽

Hyperthermia Treatment ◽

Specific Absorption

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Magnetic Nanoparticles with High Specific Absorption Rate at Low Alternating Magnetic Field

Nano LIFE ◽

10.1142/s1793984415500026 ◽

2015 ◽

Vol 05 (02) ◽

pp. 1550002 ◽

Cited By ~ 7

Author(s):

K. Kekalo ◽

I. Baker ◽

R. Meyers ◽

J. Shyong

Keyword(s):

Magnetic Field ◽

Magnetic Nanoparticles ◽

Magnetic Nanoparticle ◽

Absorption Rate ◽

Specific Absorption Rate ◽

Alternating Magnetic Field ◽

Hyperthermia Treatment ◽

Specific Absorption ◽

New Type ◽

Carboxymethyl Dextran

This paper describes the synthesis and properties of a new type of magnetic nanoparticle (MNP) for use in the hyperthermia treatment of tumors. These particles consist of 2–4 nm crystals of gamma- Fe 2 O 3 gathered in 20–40 nm aggregates with a coating of carboxymethyl-dextran, producing a zetasize of 110–120 nm. Despite their very low saturation magnetization (1.5–6.5 emu/g), the specific absorption rate (SAR) of the nanoparticles is 22–200 W/g at applied alternating magnetic field (AMF) with strengths of 100–500 Oe at a frequency of 160 kHz.

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